Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Error code: 429 - {'error': {'message': 'You exceeded your current quota, please check your plan and billing details. For more information on this error, read the docs: https://platform.openai.com/docs/guides/error-codes/api-errors.', 'type': 'insufficient_quota', 'param': None, 'code': 'insufficient_quota'}}
 ###Tabelas: 
CREATE TABLE student_mental_health (student_id INT, grade_level INT, mental_health_score INT); INSERT INTO student_mental_health (student_id, grade_level, mental_health_score) VALUES (1, 6, 75), (2, 7, 80), (3, 6, 85), (4, 7, 70), (5, 6, 70), (6, 7, 85), (7, 6, 90);
SELECT smh.student_id, smh.grade_level, smh.mental_health_score FROM student_mental_health smh JOIN (SELECT grade_level, AVG(mental_health_score) as avg_mh FROM student_mental_health GROUP BY grade_level) sub ON smh.grade_level = sub.grade_level WHERE smh.mental_health_score < sub.avg_mh;